Here’s the [https://cardiagn.com/2000-lexus-rx-300-repair-shop-manual-damage-repair-manual-pdf/|2000 Lexus RX 300 Service Repair Manual and Wiring Diagram]. I realize that you said that it was a 2003 model but hopefully they may be the same as far as starting the vehicle is concerned.
As you have already replaced the starter, according to the ''Diagnostics'' section (see image) the problem then may either be the Start relay or the Neutral Start switch
[image|2195366]
(click on image to enlarge for better viewing)
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The description for the location and testing of the Neutral Start Switch can be found in the ''Diagnostics'' section p.DI-188 -DI191.
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The description for the location and testing of the Neutral Start Switch can be found in the ''Diagnostics'' section p.DI-188 to p.DI-191.
Hi,
Here’s the [https://cardiagn.com/2000-lexus-rx-300-repair-shop-manual-damage-repair-manual-pdf/|2000 Lexus RX 300 Service Repair Manual and Wiring Diagram]. I realize that you said that it was a 2003 model but hopefully they may be the same as far as starting the vehicle is concerned.
As you have already replaced the starter, according to the ''Diagnostics'' section (see image) the problem then may either be the Start relay or the Neutral Start switch
[image|2195366]
(click on image to enlarge for better viewing)
The description for the location and testing of the Neutral Start Switch can be found in the ''Diagnostics'' section p.DI-188 -DI191.
Hopefully this may be of some help.